Okay, this is a common situation, and here's a breakdown of how I would approach it, considering the code compliance, practicality, and durability

Understanding the Challenges:
Direct Burial of UF Cable

UF (Underground Feeder) cable is designed for direct burial, but not direct encasement in concrete. The concrete can react with the cable jacket over time, causing it to degrade.

Protection at Entry Point

You need to protect the UF cable from abrasion and sharp edges at the entry point into the aluminum pole. Direct rubbing against the aluminum edge can lead to a short over time

Securing the Pole in Sandy Soil

Sandy soil provides poor stability. You'll likely need concrete to properly anchor the post.

Working Inside the Pole

Access inside the pole, especially near the base, is typically limited or non-existent.

Here's my recommended approach


Foundation Preparation (Essential for Sandy Soil)



Dig a Hole

Dig a hole large enough and deep enough to accommodate a concrete base. The size depends on the height and weight of the post and the expected wind load, but I would start with a minimum of 12" diameter and 18" deep.

Consult local codes/guidelines for specific foundation requirements. Some areas have prescriptive requirements based on soil type. Gravel Base (Important)

Add a layer of gravel (4-6 inches) at the bottom of the hole for drainage. This helps prevent water from pooling around the concrete and potentially damaging the UF cable.

Optional Form

You can use a Sonotube (cardboard concrete form) or a homemade form to create a cleaner concrete base. This isn't strictly necessary, but it makes for a more professional-looking installation.2.

Creating a Protective Raceway



Short PVC Conduit Section

This is key. You're going to create a short raceway for the UF cable as it passes through the concrete and into the aluminum pole. Use a piece of

1-inch Schedule 40 PVC conduit. This will provide ample space for the UF cable and allow for future replacement if needed. Cut the PVC conduit to a length that extends at least 6 inches below the bottom of the aluminum pole and a few inches above where the UF cable will enter the pole. The bottom should extend slightly beyond the concrete level. Secure the PVC Conduit to the Pole (Before Concreting)



Bushing (Essential)

Use a

PVC conduit bushing to protect the UF cable where it enters the PVC conduit at the pole. This is non-negotiable. A proper bushing will have a smooth, rounded edge to prevent abrasion of the cable. Method 1 (Most Common)

Slide the PVC conduit up into the pole. The bushing needs to fit snugly in the 1 1/4" hole at the base of the post. You may have to play around to find the right one. You can use a PVC Coupling and glue that to the inside of the pole to reduce the opening if needed.

Method 2 (alternative)

Get a reducing fitting that fits the 1 1/4" pole opening and reduces to the 1" PVC.

Important Considerations



Cable Bend Radius

Be mindful of the minimum bend radius of the UF cable. Don't force it into too tight of a bend.3.

Positioning and Concreting



Position the Pole and Conduit

Place the aluminum pole (with the PVC conduit attached) in the center of the hole, resting on the gravel base. Ensure the pole is plumb (perfectly vertical). Use temporary bracing (wood stakes and supports) to hold it in place while the concrete sets.

Mix and Pour Concrete

Mix concrete according to the manufacturer's instructions. Pour the concrete into the hole, filling it to the desired level (typically a few inches below the final grade).

Trowel the Concrete

Smooth the top of the concrete with a trowel, creating a slight slope away from the pole to promote water runoff.

Allow to Cure

Allow the concrete to cure completely according to the manufacturer's instructions (typically 24-72 hours).4.

Wiring (After Concrete Cures)



Pull UF Cable

Carefully pull the UF cable up through the PVC conduit into the pole. Be careful not to damage the cable insulation.

Connections

Make all electrical connections inside the post light fixture following the manufacturer's instructions and all applicable electrical codes. Use appropriate wire connectors (wire nuts or push-in connectors) for a secure and reliable connection.

Grounding

Ensure proper grounding of the fixture and the metal pole.

Important Considerations and Code Compliance



Local Codes

ALWAYS consult your local electrical codes and building codes. Requirements vary by location. You may need a permit for this work.

Depth

Make sure the depth is below your local frost line if you live in a cold climate

UF Cable Depth

When burying the UF cable that feeds the post light, make sure it's buried to the depth required by your local codes (typically 18-24 inches).

GFCI Protection

Ensure the circuit feeding the post light is GFCI protected. This is usually required for outdoor lighting circuits.

Licensed Electrician

If you are not comfortable with any part of this process, especially the electrical connections, hire a qualified, licensed electrician. Electricity can be dangerous.

Why this approach is better



Protects UF Cable

The PVC conduit isolates the UF cable from direct contact with the concrete, preventing chemical degradation. The bushing protects it from abrasion.

Provides a Raceway

The conduit acts as a raceway, making it easier to pull the cable and allows for future replacement if needed.

Secure Pole

The concrete provides a solid foundation for the post light, even in sandy soil.

Code Compliant

This method is generally compliant with electrical codes when done correctly.*

Professional Appearance: The resulting installation looks neat and professional.Let me know if you have any other questions! Good luck with your project! Flag for review